Rtjmee foe sceapees



(No'ModeL) L. D YoRK.

V RUNNER FOR SGRAPERS.

No. 295,892. Patented Mar. 25, 1884.

\K/ITHEESEE= J iggggjg @m u. PETERS, PhnIn-lilhcgraplwr, wam n nnnnn a their lower ends.

I i v incorrespondingly conical recesses in the bot- Q 35 tom of the runner. i recesses is drawn upward to a sufiicient ex- To aZZ whom it may concern Be it known that I, LEVI D. YORK, of Portsmouth, Scioto county, in the State of Ohio,

j have invented certain new and useful Improvements relating to Runners for Scrapers,

of which the following is a specification.

My invention applies to what are known as road-scrapers, earth-scrapers, excavators, &c., in each of which is employed a flatbottomed or nearlyfiat-bottomed scoop, of thin steel or other material which it is desirable to protect from excessive wear. It has long been common to provide such with longitudinal runners, eitherat the edges or fixed at any given U distance inward from the edges under the bottom. It is common to make such runners from square bars of iron or steel. It is frequently required in the use of scrapers to I i move the scraper more or less sidewise. "zoiperpendicular sides of the ordinary runners The oppose more resistance to such motion than is desirable, but it is absolutely essential to have a reasonable amount of width for the bearing atthe bottom, and to producethe ordinary ij j solid runners with inclined sides would involve a considerable addition to the weight.

I employ hollow runners, of a troughshaped section, with the bottom of sufficient thickness to withstandlong wear, and with-the f sides flared to an angle of thirty degrees, more or less, from the vertical. My hollow runners are securedby rivets having conical heads at These conical heads are set The metal around these tent to make those points in the runner the last. parts to wearthrough; consequently my rivets are held firmly by their conical heads 4 until the runner has been rendered worthless by wearing out at other points.

The following is a description of what I consider the best means of carrying out the invention.

The accompanying drawings form a part of thisspecification.

Figure 1 is a side elevation, and Fig. 2 a cross section showing .the entire scraper. Figs. 3 and 4 show small portions on a larger y scale. Fig.3 is a transverse section through one of the runners and that portion of the n h n. YORK, or PORTSMOUTEOHIO, Assrenon TO THE YORK MANUFAC- 2 TUBING COMPANY, on OHIO.

RUNNERtFOR SCRAPERS.

SPECIFICATION forming part of Letters Patent No. 295,892, dated March 25, 1884.

Application filed September 10,1883. (No model.)

bottom immediately adjacent. Fig. 4 is a longitudinal section through the same parts.

Similar letters of reference indicate corresponding parts in all the figures.

A is the body of a scraper formed of sheet steel of proper thickness, preferably in the manner set forth in the patent to me dated December 27, 1881,,No. 251,683. The front edge is somewhat thin or sharpened.

B B are rivets, firmly set in the bottom, by the aid of which the runners are secured.

Each entire runner is marked -D, certain portions being designated, when necessary, by additional marks, as D D By the employment of suitably shaped rollers they are produced in a hollowed or channeled form, with the. sides D standing at an angle of about one hundred and twenty degrees with the bottom D I reduce the depth of the front end of each runner, and also to some extent the depth of the back end, thus giving a sledge like action, as the runnerimpresses its shape more or less into the hard earth over which the scraper is moved.

The body of each rivet is marked B. The

lower end has a deep conical head, B. The holes in the thick bottomof the runner are correspondingly tapered, to receive the heads B, and are preferably formed by punching over a suitably-hollowed die While the steel is hot, thus not simply cutting out but forcing up the metal and raising it on the interior of the runner. The effect is to afford a long bearing on the rivet, which holds reliably after a considerable portion of the thickness of the bottom has been worn off. The upper end, B, of each rivet may beproduced by ordinary means after theinsertion of the rivet, and may usually project somewhat above the upper surface of the bottom of the scraper A without seriousobjection. Whether the rivets'are inserted hot or cold, it is easy to confine the hollow runners strongly and firmly. The elasticity of the runner, due to its hollow form and flared sides, as thus forcibly heldlup by these rivets, contributes to maintain a tight, firm joint under all conditions. The runners form a unit with the body both for contributing to its rigidity and yielding to its elasticity. Their Ioo around in steering and in the various manipulations required in the exigencies of rough work. Scrapers with my runners are lighter than ordinary scrapers havingthesamebreadth and depth of runners.

NVhen scrapers with ordinary runners are worked in adhesive soil, the material is liable to stick in the angle on each side of the runner. My runners, by reason of the inclinations of their sides, present less facility for such accumulation.

Modifications may be made in the forms and proportions within wide limits. The rivets may be set nearer together or wider apart. The tension of the rivets tends to draw up the base of the runner at each point where a rivet is inserted, and even if no care is taken to raise the metal adjacent to the hole, the tension induces this effect to a sufficient degree to make those points the last to wear out. The hollow runners are thus sure to be held by the conical rivets until they commence to be worn through at other points, when they must be removed and new ones substituted.

I claim as my invention- 1. The hollowed runners for scrapers herein described, having a thick bottom, D", with inclined sides D, adapted to serve as herein scribing witnesses.

LEVI D. YORK. WVitnesses:

-WM. B. GRICE,

P. S. INNIS. 

